From 6e01668c1fcc9c33e66de243398cdc39084912df Mon Sep 17 00:00:00 2001
From: helly <helly@642ea486-5414-0410-9d7f-a0204ed87703>
Date: Wed, 12 May 2004 09:46:18 +0000
Subject: [PATCH] Fix possible SEGV

---
 dfa.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dfa.h b/dfa.h
index 6bd78248..9761e4e4 100644
--- a/dfa.h
+++ b/dfa.h
@@ -145,7 +145,7 @@ inline bool Action::isMatch() const
 	{ return false; }
 
 inline bool Action::readAhead() const
-	{ return !isMatch() || !state->next->action->isRule(); }
+	{ return !isMatch() || (state && state->next && state->next->action && !state->next->action->isRule()); }
 
 inline Match::Match(State *s) : Action(s)
     { }
-- 
2.40.0